Fix up commit-tree/diff-tree user interface issues.
No, this doesn't make them easy to use, but makes diff-tree use
the "-r" flag for "recursive" (not "-R") and makes commit-tree
use AUTHOR_xxx environment flags (not COMMITTER_xxx) to match what
it actually does.
diff --git a/diff-tree.c b/diff-tree.c
index 5cf6057..1960c23 100644
--- a/diff-tree.c
+++ b/diff-tree.c
@@ -180,7 +180,7 @@
char *arg = argv[1];
argv++;
argc--;
- if (!strcmp(arg, "-R")) {
+ if (!strcmp(arg, "-r")) {
recursive = 1;
continue;
}